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Title: Balance of oxygen throughout the conversion of a high-level waste melter feed to glass

Gases evolve from nuclear waste melter feed during conversion to glass in response to heating. This article is focused on oxygen mass balance based on the stoichiometry of feed melting reactions and evolved-gas analysis data. Whereas O 2-producing and -consuming batch-melting reactions are complete in the reacting and primary-foam layers of the cold cap, O 2 from redox reactions continues to evolve as long as melt temperature increases, and thus generates secondary foam. Also, we discuss the relationship between the oxygen mass balance and the temperature-dependent iron redox ratio and the O 2 partial pressure, as they evolve during the feed-to-glass conversion.
Authors:
 [1] ;  [1] ;  [2] ;  [2] ;  [2] ;  [1] ;  [1] ;  [3]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
  2. Joint Workplace of the Univ. of Chemistry and Technology Prague (Czech Republic). Lab. of Inorganic Materials
  3. USDOE Office of River Protection, Richland, WA (United States)
Publication Date:
Report Number(s):
PNNL-SA-125403
Journal ID: ISSN 0272-8842; PII: S0272884217314141
Grant/Contract Number:
AC05-76RL01830; 20-SVV/2017
Type:
Accepted Manuscript
Journal Name:
Ceramics International
Additional Journal Information:
Journal Volume: 43; Journal Issue: 16; Journal ID: ISSN 0272-8842
Publisher:
Elsevier
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Oxygen mass balance; Feed-to-glass conversion; Evolved gas; Oxygen partial pressure; Fe redox ratio
OSTI Identifier:
1368408